WINNER
2009	Song of Time, Ian R. MacLeod
(tie)	Little Brother, Cory Doctorow
2008	In War Times, Kathleen Ann Goonan
2007	Titan, Ben Bova
2006	Mindscan, Robert J. Sawyer
2005	Market Forces, Richard Morgan
2004	Omega, Jack McDevitt
2003	Probability Space, Nancy Kress
2002	The Chronoliths, Robert Charles Wilson
(tie)	Terraforming Earth, Jack Williamson
2001	Genesis, Poul Anderson
2000	A Deepness in the Sky, Vernor Vinge
1999	Brute Orbits, George Zebrowski
1998	Forever Peace, Joe Haldeman
1997	Fairyland, Paul J. McAuley
1996	The Time Ships, Stephen Baxter
1995	Permutation City, Greg Egan
1994	no award
1993	Brother to Dragons, Charles Sheffield
1992	Buddy Holly Is Alive and Well on Ganymede, Bradley Denton
1991	Pacific Edge, Kim Stanley Robinson
1990	The Child Garden, Geoff Ryman
1989	Islands in the Net, Bruce Sterling
1988	Lincoln's Dreams, Connie Willis
1987	A Door Into Ocean, Joan Slonczewski
1986	The Postman, David Brin
1985	The Years of the City, Frederik Pohl
1984	The Citadel of the Autarch, Gene Wolfe
1983	Helliconia Spring, Brian W. Aldiss
1982	Riddley Walker, Russell Hoban
1981	Timescape, Gregory Benford
1980	On Wings of Song, Thomas M. Disch
1979	Gloriana, Michael Moorcock
1978	Gateway, Frederik Pohl
1977	The Alteration, Kingsley Amis
1976	no award
1975	Flow My Tears, the Policeman Said, Philip K. Dick
1974	Rendezvous with Rama, Arthur C. Clarke
1974	Malevil, Robert Merle
1973	Beyond Apollo, Barry N. Malzberg
	RETROSPECTIVE PRIZE
1976	The Year of the Quiet Sun, Wilson Tucker
	SPECIAL AWARD FOR EXCELLENCE IN WRITING
1973	Dying Inside, Robert Silverberg
	NONFICTION BOOK
1974	The Cosmic Connection, Carl Sagan